Put simply, sleep is the maintenance system that keeps every organ functioning properly, says Andrea Matsumura, MD, a board-certified physician in internal and sleep medicine. “The seven-to-nine-hour ...

We’ve long known that a lack of sleep is bad for the heart – but scientists are now starting to understand exactly how it causes harm. In a study from Uppsala University in Sweden, researchers found ...

I can barely sleep past 6:30 a.m. Even if I have the opportunity to sleep in, my body just doesn’t let me; my eyes pop open at the crack of dawn every day, regardless. But my teens? They’re a ...

Learn facts about sleep, during which the body rests, recuperates and performs essential repairs. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Most of us treat sleep like it’s a simple budget item: we ...

Background Falls can repeatedly occur as people age, which leads to injury, disability and mortality in older adults. Sleep ...

What is sleeping beauty syndrome? Kleine-Levin syndrome (KLS), also known as “Sleeping beauty syndrome” or “familial hibernation syndrome,” is a neurological disorder that causes sufferers to sleep ...